Arc element for a ventilation system

Abstract

An arc element for a ventilation system has at least one oval opening and a flow cross-section with a minimum radius of curvature, which has at least the size of one tenth of the smallest diameter of this flow cross-section.

1 . An arc element for a ventilation system comprising
 1.1. an outer wall limiting an inner space of the arc element,   1.2. a first opening aligned vertically to a first direction,   1.3. a second opening aligned vertically to a second direction and   1.4. at least one flow guide element arranged in the inner space,   1.5. wherein the at least one flow guide element is configured double curved, whereby the at least one flow guide element has a curvature in flow direction and has a curvature in a plane of a flow cross-section (A) of the inner space.   
     
     
         2 . The arc element according to  claim 1 , wherein the at least one flow guide element is configured as one piece with the outer wall. 
     
     
         3 . The arc element according to  claim 1 , wherein the at least one flow guide element is configured separately from the outer wall and is at least partially inserted in the outer wall of the arc element with positive locking. 
     
     
         4 . The arc element according to  claim 1 , comprising an elliptic flow cross-section (A). 
     
     
         5 . The arc element according to  claim 1 , wherein all surfaces of the arc element coming into contact with the medium to be conducted have an average surface roughness (Rz) of less than 5 μm. 
     
     
         6 . The arc element according to  claim 1 , wherein the outer wall has an elastic area. 
     
     
         7 . The arc element according to  claim 1 , comprising a flow cross-section (A) varying in flow direction. 
     
     
         8 . The arc element according to  claim 1 , wherein one of the openings has a circular shape. 
     
     
         9 . The arc element according to  claim 1 , wherein it has a maximum ratio of flow cross-section (A) and hydraulic diameter of 15 cm. 
     
     
         10 . The arc element according to  claim 1 , wherein the outer wall of the arc element and the at least one flow guide element are produced in one single process step. 
     
     
         11 . (canceled) 
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . An assembly set comprising
 14.1. an arc element according to  claim 1  and   14.2. an assembly device comprising
 14.2.1 a base plate, 
 14.2.2. at least two guiding elements arranged on the base plate and 
 14.2.3. at least one fixing element for fixing the arc element relative to the base plate, 
 14.2.4. wherein the fixing element may be connected with at least two of the guiding elements with one of the group comprising force-locking and positive locking. 
   
     
     
         15 . The assembly set according to  claim 14 , wherein the arc element has spatial structures on its outside, which are positively locked with corresponding areas of at least one of the group comprising the guiding elements and the fixing element upon arranging the arc element in the assembly device. 
     
     
         16 . The assembly set according to  claim 14 , wherein it comprises at least one sealing element for sealing the connection of a duct element with the arc element. 
     
     
         17 . A ventilation system with
 17.1. a fan for producing an air flow,   17.2. wherein the fan is connected with an air outlet opening via a ventilation duct with at least one arc element according to  claim 1 .   
     
     
         18 . The arc element according to  claim 1 , wherein at least one of the openings is configured ovally with a ratio between largest diameter (d max ) and smallest diameter (d min ) of at least 1.5:1. 
     
     
         19 . The arc element according to  claim 18 , wherein the flow cross-section (A) of the inner space has a minimum radius of curvature (r min ), which has the size of at least one tenth of the smallest diameter (d min ) of this flow cross-section (A), r min ≥d min /10.